If I Could Give My Younger Self 1 Piece of Investing Advice, This Is What It Would Be

The author reflects on losing 99.2% of his first investment in Lucent Technologies and shares three key investing lessons: diversify across many stocks via index funds rather than concentrating capital in single stocks, diversify across asset classes (stocks, bonds, crypto), and develop a solid investment thesis by understanding what a company sells and why its profits should grow before investing.